]>
Commit | Line | Data |
---|---|---|
d7f09764 DN |
1 | /* Input functions for reading LTO sections. |
2 | ||
23a5b65a | 3 | Copyright (C) 2009-2014 Free Software Foundation, Inc. |
d7f09764 DN |
4 | Contributed by Kenneth Zadeck <zadeck@naturalbridge.com> |
5 | ||
6 | This file is part of GCC. | |
7 | ||
8 | GCC is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 3, or (at your option) any later | |
11 | version. | |
12 | ||
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GCC; see the file COPYING3. If not see | |
20 | <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "config.h" | |
23 | #include "system.h" | |
24 | #include "coretypes.h" | |
25 | #include "tm.h" | |
d7f09764 | 26 | #include "tree.h" |
2fb9a547 AM |
27 | #include "basic-block.h" |
28 | #include "tree-ssa-alias.h" | |
29 | #include "internal-fn.h" | |
30 | #include "gimple-expr.h" | |
31 | #include "is-a.h" | |
8e9055ae | 32 | #include "gimple.h" |
d7f09764 DN |
33 | #include "expr.h" |
34 | #include "flags.h" | |
35 | #include "params.h" | |
36 | #include "input.h" | |
d7f09764 | 37 | #include "hashtab.h" |
d7f09764 | 38 | #include "function.h" |
1da2ed5f | 39 | #include "diagnostic-core.h" |
d7f09764 | 40 | #include "except.h" |
d7f09764 | 41 | #include "timevar.h" |
d7f09764 DN |
42 | #include "lto-streamer.h" |
43 | #include "lto-compress.h" | |
44 | ||
45 | /* Section names. These must correspond to the values of | |
46 | enum lto_section_type. */ | |
47 | const char *lto_section_name[LTO_N_SECTION_TYPES] = | |
48 | { | |
49 | "decls", | |
50 | "function_body", | |
0b394350 | 51 | "statics", |
ab96cc5b | 52 | "symtab", |
369451ec | 53 | "refs", |
49f836ba | 54 | "asm", |
0b394350 AK |
55 | "jmpfuncs", |
56 | "pureconst", | |
57 | "reference", | |
0208f7da | 58 | "profile", |
15d0e7a0 | 59 | "symbol_nodes", |
922f15c2 | 60 | "opts", |
10a5dd5d | 61 | "cgraphopt", |
2c9561b5 MJ |
62 | "inline", |
63 | "ipcp_trans" | |
d7f09764 DN |
64 | }; |
65 | ||
d7f09764 | 66 | |
d7f09764 DN |
67 | /* Hooks so that the ipa passes can call into the lto front end to get |
68 | sections. */ | |
69 | ||
b8698a0f | 70 | static struct lto_file_decl_data ** file_decl_data; |
d7f09764 DN |
71 | static lto_get_section_data_f* get_section_f; |
72 | static lto_free_section_data_f* free_section_f; | |
73 | ||
74 | ||
75 | /* This is called from the lto front end to set up the hooks that are | |
76 | used by the ipa passes to get the data that they will | |
77 | deserialize. */ | |
78 | ||
b8698a0f L |
79 | void |
80 | lto_set_in_hooks (struct lto_file_decl_data ** data, | |
d7f09764 DN |
81 | lto_get_section_data_f* get_f, |
82 | lto_free_section_data_f* free_f) | |
83 | { | |
84 | file_decl_data = data; | |
85 | get_section_f = get_f; | |
86 | free_section_f = free_f; | |
87 | } | |
88 | ||
89 | ||
90 | /* Return an array of file decl datas for all of the files passed to | |
91 | this compilation. */ | |
92 | ||
93 | struct lto_file_decl_data ** | |
94 | lto_get_file_decl_data (void) | |
95 | { | |
96 | gcc_assert (file_decl_data); | |
97 | return file_decl_data; | |
98 | } | |
99 | ||
100 | /* Buffer structure for accumulating data from compression callbacks. */ | |
101 | ||
102 | struct lto_buffer | |
103 | { | |
104 | char *data; | |
105 | size_t length; | |
106 | }; | |
107 | ||
108 | /* Compression callback, append LENGTH bytes from DATA to the buffer pointed | |
109 | to by OPAQUE. */ | |
110 | ||
111 | static void | |
112 | lto_append_data (const char *data, unsigned length, void *opaque) | |
113 | { | |
114 | struct lto_buffer *buffer = (struct lto_buffer *) opaque; | |
115 | ||
116 | buffer->data = (char *) xrealloc (buffer->data, buffer->length + length); | |
117 | memcpy (buffer->data + buffer->length, data, length); | |
118 | buffer->length += length; | |
119 | } | |
120 | ||
121 | /* Header placed in returned uncompressed data streams. Allows the | |
122 | uncompressed allocated data to be mapped back to the underlying | |
123 | compressed data for use with free_section_f. */ | |
124 | ||
125 | struct lto_data_header | |
126 | { | |
127 | const char *data; | |
128 | size_t len; | |
129 | }; | |
130 | ||
131 | /* Return a char pointer to the start of a data stream for an LTO pass | |
132 | or function. FILE_DATA indicates where to obtain the data. | |
133 | SECTION_TYPE is the type of information to be obtained. NAME is | |
134 | the name of the function and is only used when finding a function | |
135 | body; otherwise it is NULL. LEN is the size of the data | |
136 | returned. */ | |
137 | ||
138 | const char * | |
b8698a0f | 139 | lto_get_section_data (struct lto_file_decl_data *file_data, |
d7f09764 | 140 | enum lto_section_type section_type, |
b8698a0f | 141 | const char *name, |
d7f09764 DN |
142 | size_t *len) |
143 | { | |
144 | const char *data = (get_section_f) (file_data, section_type, name, len); | |
145 | const size_t header_length = sizeof (struct lto_data_header); | |
146 | struct lto_data_header *header; | |
147 | struct lto_buffer buffer; | |
148 | struct lto_compression_stream *stream; | |
149 | lto_stats.section_size[section_type] += *len; | |
150 | ||
151 | if (data == NULL) | |
152 | return NULL; | |
153 | ||
154 | /* FIXME lto: WPA mode does not write compressed sections, so for now | |
155 | suppress uncompression if flag_ltrans. */ | |
156 | if (flag_ltrans) | |
157 | return data; | |
158 | ||
159 | /* Create a mapping header containing the underlying data and length, | |
160 | and prepend this to the uncompression buffer. The uncompressed data | |
161 | then follows, and a pointer to the start of the uncompressed data is | |
162 | returned. */ | |
163 | header = (struct lto_data_header *) xmalloc (header_length); | |
164 | header->data = data; | |
165 | header->len = *len; | |
b8698a0f | 166 | |
d7f09764 | 167 | buffer.data = (char *) header; |
b8698a0f | 168 | buffer.length = header_length; |
d7f09764 DN |
169 | |
170 | stream = lto_start_uncompression (lto_append_data, &buffer); | |
171 | lto_uncompress_block (stream, data, *len); | |
172 | lto_end_uncompression (stream); | |
173 | ||
174 | *len = buffer.length - header_length; | |
175 | return buffer.data + header_length; | |
176 | } | |
177 | ||
178 | ||
179 | /* Free the data found from the above call. The first three | |
180 | parameters are the same as above. DATA is the data to be freed and | |
181 | LEN is the length of that data. */ | |
182 | ||
b8698a0f L |
183 | void |
184 | lto_free_section_data (struct lto_file_decl_data *file_data, | |
d7f09764 DN |
185 | enum lto_section_type section_type, |
186 | const char *name, | |
187 | const char *data, | |
188 | size_t len) | |
189 | { | |
190 | const size_t header_length = sizeof (struct lto_data_header); | |
191 | const char *real_data = data - header_length; | |
192 | const struct lto_data_header *header | |
193 | = (const struct lto_data_header *) real_data; | |
194 | ||
195 | gcc_assert (free_section_f); | |
196 | ||
197 | /* FIXME lto: WPA mode does not write compressed sections, so for now | |
198 | suppress uncompression mapping if flag_ltrans. */ | |
199 | if (flag_ltrans) | |
200 | { | |
201 | (free_section_f) (file_data, section_type, name, data, len); | |
202 | return; | |
203 | } | |
204 | ||
205 | /* The underlying data address has been extracted from the mapping header. | |
206 | Free that, then free the allocated uncompression buffer. */ | |
207 | (free_section_f) (file_data, section_type, name, header->data, header->len); | |
208 | free (CONST_CAST (char *, real_data)); | |
209 | } | |
210 | ||
211 | ||
212 | /* Load a section of type SECTION_TYPE from FILE_DATA, parse the | |
213 | header and then return an input block pointing to the section. The | |
214 | raw pointer to the section is returned in DATAR and LEN. These are | |
215 | used to free the section. Return NULL if the section is not present. */ | |
216 | ||
217 | struct lto_input_block * | |
b8698a0f | 218 | lto_create_simple_input_block (struct lto_file_decl_data *file_data, |
d7f09764 DN |
219 | enum lto_section_type section_type, |
220 | const char **datar, size_t *len) | |
221 | { | |
222 | const char *data = lto_get_section_data (file_data, section_type, NULL, len); | |
b8698a0f | 223 | const struct lto_simple_header * header |
d7f09764 DN |
224 | = (const struct lto_simple_header *) data; |
225 | ||
226 | struct lto_input_block* ib_main; | |
4ad9a9de | 227 | int main_offset = sizeof (struct lto_simple_header); |
d7f09764 DN |
228 | |
229 | if (!data) | |
230 | return NULL; | |
231 | ||
232 | ib_main = XNEW (struct lto_input_block); | |
233 | ||
234 | *datar = data; | |
235 | LTO_INIT_INPUT_BLOCK_PTR (ib_main, data + main_offset, | |
236 | 0, header->main_size); | |
237 | ||
238 | return ib_main; | |
239 | } | |
240 | ||
241 | ||
242 | /* Close the section returned from a call to | |
243 | LTO_CREATE_SIMPLE_INPUT_BLOCK. IB is the input block returned from | |
244 | that call. The FILE_DATA and SECTION_TYPE are the same as what was | |
245 | passed to that call and the DATA and LEN are what was returned from | |
246 | that call. */ | |
247 | ||
248 | void | |
b8698a0f | 249 | lto_destroy_simple_input_block (struct lto_file_decl_data *file_data, |
d7f09764 DN |
250 | enum lto_section_type section_type, |
251 | struct lto_input_block *ib, | |
252 | const char *data, size_t len) | |
253 | { | |
254 | free (ib); | |
255 | lto_free_section_data (file_data, section_type, NULL, data, len); | |
256 | } | |
257 | ||
258 | /*****************************************************************************/ | |
259 | /* Record renamings of static declarations */ | |
260 | /*****************************************************************************/ | |
261 | ||
262 | struct lto_renaming_slot | |
263 | { | |
264 | const char *old_name; | |
265 | const char *new_name; | |
266 | }; | |
267 | ||
268 | /* Returns a hash code for P. */ | |
269 | ||
270 | static hashval_t | |
271 | hash_name (const void *p) | |
272 | { | |
273 | const struct lto_renaming_slot *ds = (const struct lto_renaming_slot *) p; | |
274 | return (hashval_t) htab_hash_string (ds->new_name); | |
275 | } | |
276 | ||
277 | /* Returns nonzero if P1 and P2 are equal. */ | |
278 | ||
279 | static int | |
280 | eq_name (const void *p1, const void *p2) | |
281 | { | |
282 | const struct lto_renaming_slot *s1 = | |
283 | (const struct lto_renaming_slot *) p1; | |
284 | const struct lto_renaming_slot *s2 = | |
285 | (const struct lto_renaming_slot *) p2; | |
286 | ||
287 | return strcmp (s1->new_name, s2->new_name) == 0; | |
288 | } | |
289 | ||
290 | /* Free a renaming table entry. */ | |
291 | ||
292 | static void | |
293 | renaming_slot_free (void *slot) | |
294 | { | |
295 | struct lto_renaming_slot *s = (struct lto_renaming_slot *) slot; | |
296 | ||
297 | free (CONST_CAST (void *, (const void *) s->old_name)); | |
298 | free (CONST_CAST (void *, (const void *) s->new_name)); | |
299 | free ((void *) s); | |
300 | } | |
301 | ||
302 | /* Create an empty hash table for recording declaration renamings. */ | |
303 | ||
304 | htab_t | |
305 | lto_create_renaming_table (void) | |
306 | { | |
307 | return htab_create (37, hash_name, eq_name, renaming_slot_free); | |
308 | } | |
309 | ||
310 | /* Record a declaration name mapping OLD_NAME -> NEW_NAME. DECL_DATA | |
311 | holds the renaming hash table to use. */ | |
312 | ||
313 | void | |
314 | lto_record_renamed_decl (struct lto_file_decl_data *decl_data, | |
315 | const char *old_name, const char *new_name) | |
316 | { | |
317 | void **slot; | |
318 | struct lto_renaming_slot r_slot; | |
319 | ||
320 | r_slot.new_name = new_name; | |
321 | slot = htab_find_slot (decl_data->renaming_hash_table, &r_slot, INSERT); | |
322 | if (*slot == NULL) | |
323 | { | |
324 | struct lto_renaming_slot *new_slot = XNEW (struct lto_renaming_slot); | |
325 | new_slot->old_name = xstrdup (old_name); | |
326 | new_slot->new_name = xstrdup (new_name); | |
327 | *slot = new_slot; | |
328 | } | |
329 | else | |
330 | gcc_unreachable (); | |
331 | } | |
332 | ||
333 | ||
334 | /* Given a string NAME, return the string that it has been mapped to | |
335 | by lto_record_renamed_decl. If NAME was not renamed, it is | |
336 | returned unchanged. DECL_DATA holds the renaming hash table to use. */ | |
337 | ||
338 | const char * | |
339 | lto_get_decl_name_mapping (struct lto_file_decl_data *decl_data, | |
340 | const char *name) | |
341 | { | |
342 | htab_t renaming_hash_table = decl_data->renaming_hash_table; | |
343 | struct lto_renaming_slot *slot; | |
344 | struct lto_renaming_slot r_slot; | |
345 | ||
346 | r_slot.new_name = name; | |
347 | slot = (struct lto_renaming_slot *) htab_find (renaming_hash_table, &r_slot); | |
348 | if (slot) | |
349 | return slot->old_name; | |
350 | else | |
351 | return name; | |
352 | } | |
353 | ||
354 | /*****************************************************************************/ | |
355 | /* Input decl state object. */ | |
356 | /*****************************************************************************/ | |
357 | ||
358 | /* Return a newly created in-decl state object. */ | |
359 | ||
360 | struct lto_in_decl_state * | |
361 | lto_new_in_decl_state (void) | |
362 | { | |
a9429e29 | 363 | return ggc_alloc_cleared_lto_in_decl_state (); |
d7f09764 DN |
364 | } |
365 | ||
366 | /* Delete STATE and its components. */ | |
367 | ||
368 | void | |
369 | lto_delete_in_decl_state (struct lto_in_decl_state *state) | |
370 | { | |
371 | int i; | |
372 | ||
373 | for (i = 0; i < LTO_N_DECL_STREAMS; i++) | |
374 | if (state->streams[i].trees) | |
49ba8180 JH |
375 | ggc_free (state->streams[i].trees); |
376 | ggc_free (state); | |
d7f09764 DN |
377 | } |
378 | ||
379 | /* Hashtable helpers. lto_in_decl_states are hash by their function decls. */ | |
380 | ||
381 | hashval_t | |
382 | lto_hash_in_decl_state (const void *p) | |
383 | { | |
384 | const struct lto_in_decl_state *state = (const struct lto_in_decl_state *) p; | |
385 | return htab_hash_pointer (state->fn_decl); | |
386 | } | |
387 | ||
388 | /* Return true if the fn_decl field of the lto_in_decl_state pointed to by | |
389 | P1 equals to the function decl P2. */ | |
390 | ||
391 | int | |
392 | lto_eq_in_decl_state (const void *p1, const void *p2) | |
393 | { | |
394 | const struct lto_in_decl_state *state1 = | |
395 | (const struct lto_in_decl_state *) p1; | |
396 | const struct lto_in_decl_state *state2 = | |
397 | (const struct lto_in_decl_state *) p2; | |
398 | return state1->fn_decl == state2->fn_decl; | |
399 | } | |
400 | ||
401 | ||
402 | /* Search the in-decl state of a function FUNC contained in the file | |
403 | associated with FILE_DATA. Return NULL if not found. */ | |
404 | ||
405 | struct lto_in_decl_state* | |
406 | lto_get_function_in_decl_state (struct lto_file_decl_data *file_data, | |
407 | tree func) | |
408 | { | |
409 | struct lto_in_decl_state temp; | |
410 | void **slot; | |
411 | ||
412 | temp.fn_decl = func; | |
413 | slot = htab_find_slot (file_data->function_decl_states, &temp, NO_INSERT); | |
414 | return slot? ((struct lto_in_decl_state*) *slot) : NULL; | |
415 | } | |
bc0fe8cb | 416 | |
256eefa9 JH |
417 | /* Free decl_states. */ |
418 | ||
419 | void | |
420 | lto_free_function_in_decl_state (struct lto_in_decl_state *state) | |
421 | { | |
422 | int i; | |
423 | for (i = 0; i < LTO_N_DECL_STREAMS; i++) | |
424 | ggc_free (state->streams[i].trees); | |
425 | ggc_free (state); | |
426 | } | |
427 | ||
428 | /* Free decl_states associated with NODE. This makes it possible to furhter | |
429 | release trees needed by the NODE's body. */ | |
430 | ||
431 | void | |
5e20cdc9 | 432 | lto_free_function_in_decl_state_for_node (symtab_node *node) |
256eefa9 JH |
433 | { |
434 | struct lto_in_decl_state temp; | |
435 | void **slot; | |
436 | ||
67348ccc | 437 | if (!node->lto_file_data) |
256eefa9 JH |
438 | return; |
439 | ||
67348ccc DM |
440 | temp.fn_decl = node->decl; |
441 | slot = htab_find_slot (node->lto_file_data->function_decl_states, | |
256eefa9 JH |
442 | &temp, NO_INSERT); |
443 | if (slot && *slot) | |
444 | { | |
445 | lto_free_function_in_decl_state ((struct lto_in_decl_state*) *slot); | |
67348ccc | 446 | htab_clear_slot (node->lto_file_data->function_decl_states, |
256eefa9 JH |
447 | slot); |
448 | } | |
67348ccc | 449 | node->lto_file_data = NULL; |
256eefa9 JH |
450 | } |
451 | ||
bc0fe8cb JH |
452 | |
453 | /* Report read pass end of the section. */ | |
454 | ||
455 | void | |
456 | lto_section_overrun (struct lto_input_block *ib) | |
457 | { | |
f242c0a5 JH |
458 | fatal_error ("bytecode stream: trying to read %d bytes " |
459 | "after the end of the input buffer", ib->p - ib->len); | |
460 | } | |
461 | ||
462 | /* Report out of range value. */ | |
463 | ||
464 | void | |
465 | lto_value_range_error (const char *purpose, HOST_WIDE_INT val, | |
466 | HOST_WIDE_INT min, HOST_WIDE_INT max) | |
467 | { | |
468 | fatal_error ("%s out of range: Range is %i to %i, value is %i", | |
469 | purpose, (int)min, (int)max, (int)val); | |
bc0fe8cb | 470 | } |